Missy Elliott posted this image of herself with John Mayer and Katy Perry after Elliott and Perry performed at the Super Bowl XLIX halftime show on Feb. 1, 2015.

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Katy Perry performs onstage during the Pepsi Super Bowl XLIX Halftime Show at University of Phoenix Stadium on Feb. 1, 2015 in Glendale, Ariz.

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Katy Perry Snaps a Photo with Santa

Katy Perry posted this image to her Instagram on Dec. 22, 2014 with the caption, "A casual sleighing w/santa".

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Katy Perry Goes Yachting In a Matching Ensemble

Katy Perry posted this photo to her Instagram on Nov. 17, 2014 with the caption, "G2G my whip is here."

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Did Katy Perry Get a Hello Kitty Tattoo?

Katy Perry posted this photo to Twitter on Oct. 30, 2014 with the caption, "Does this make my gang signs look soft now?"

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Katy Perry Turns 30

Katy Perry, seen at the 2014 MTV Video Music Awards, turns 30 on Oct. 25, 2014.

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Katy Perry Takes a Bowling Selfie

Katy Perry posted this photo to Instagram Oct. 11, 2014, with the caption: "Last night my fellow @COVERGIRL @iambeckyg kicked off her stay on the #PRISMATICWORLDTOUR by bowling our blues away into the wee hours of the mornin! ROUND TWO TONIGHT HOUSTON!"

Wait Till You See What Katy Perry Wears On Tour

Katy Perry performs on stage at "The Prismatic World Tour" at the Honda Center on Sept. 16, 2014 in Anaheim, Calif.

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Katy Perry Makes a Splash On Her Prismatic World Tour

Katy Perry is seen in this still from a video she posted to Instagram, Aug. 18, 2014.

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Katy Perry Performs at the White House

Singer Katy Perry performs her song "Roar" at an event for the Special Olympics hosted by President Barack Obama in the State Dining Room at the White House in Washington, July 31, 2014.

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Katy Perry Dyes Her Hair Bright Green

Katy Perry performs onstage during "The Prismatic World Tour" at Madison Square Garden, July 9, 2014, in New York.

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Katy Perry Meets Joe Biden

Katy Perry posted this photo on Instagram with this caption: "Brought my pink pony to the White House to holler @VP Joe Biden. #wheninwashington p.s. He made me call my 93 year old grandma to thank her for my baby blue eyes! What a Q-T, " June 24, 2014.

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See Katy Perry's Light-Up Tour Outfits

Katy Perry performs onstage during "The Prismatic World Tour" at PNC Arena on June 22, 2014 in Raleigh, North Carolina.

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Katy Perry performs onstage during "The Prismatic World Tour" at PNC Arena on June 22, 2014 in Raleigh, North Carolina.

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Katy Perry Goes Glittery in Glasgow

Katy Perry performs on stage during BBC Radio 1's Big Weekend at Glasgow Green on May 25, 2014 in Glasgow, United Kingdom.

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Katy Perry performs on stage during the opening night of the Prismatic World Tour at Odyssey Arena in Belfast, Ireland, May 7, 2014.

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Katy Perry attends a photocall after giving an interview at radio station 1 LIVE in Cologne, Germany, Nov. 15, 2013.

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Katy Perry tweeted this photo of her posing Geishas, Nov. 5, 2013, writing, "One of these things is not like the others." Perry is in Japan promoting her latest album, "Prism."